Three-Sequence Multi-Isocenter Radiotherapy for Unblocked Spherical Treatment
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Solution Overview
Problem
The radiosurgery robot system faces poor positioning due to blocked treatment space imaging and limited treatment space, particularly when using a low-level treatment center, which affects accurate treatment beam projection.
Innovation Solution
A radiotherapy system with a three-sequence image-guided positioning system, comprising low-level and high-level image-guided positioning systems, allowing for a fully-spherical treatment space by using multiple treatment nodes and a multi-degree-of-freedom robot to project beams from different positions and directions, ensuring unblocked imaging paths and optimized dose distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a low-level treatment center is used for radiosurgery, then the treatment space is limited and imaging paths are blocked, but the system structure is simpler
Solution Approach 1:
The image-guided positioning system is segmented into multiple sequences (first sequence, second sequence, third sequence) with different imaging paths. Each sequence uses different ray sources and detectors arranged at different positions and angles, allowing the system to switch between sequences to avoid blockages and maintain positioning accuracy throughout the fully-spherical treatment space
2Ease of operation
If a single treatment center is used, then the system is simpler to operate, but the treatment space coverage is limited
Solution Approach 1:
The system transitions from a single treatment center (one-dimensional concept) to multiple treatment centers (three-dimensional concept). By defining a high-level treatment center and a low-level treatment center at different vertical positions, the system creates a fully-spherical treatment space that encompasses both centers, expanding the coverage area while maintaining operational simplicity through automated sequence selection
3Area of stationary object
If multiple image-guided positioning systems are added to cover fully-spherical space, then treatment space coverage is improved, but device complexity increases
Solution Approach 1:
The multiple image-guided positioning systems share common components and functionality. They all use the same ray source and detector technology, follow the same imaging principles, and can be controlled through a unified control system. This multi-functionality allows the system to achieve full-spherical coverage while managing complexity through standardized, interchangeable modules
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate and effective radiosurgery treatment across a fully-spherical space with improved dose distribution and beam projection, overcoming imaging blockages and enhancing treatment efficacy.
Implementation Method 1
The three-sequence image-guided positioning system includes multiple low-level image-guided positioning systems corresponding to a low-level treatment center and a high-level image-guided positioning system corresponding to a high-level treatment center
Data Source
AI summary
A radiotherapy system based on multi-isocenter includes an accelerator and a three-sequence image-guided positioning system. The three-sequence image-guided positioning system includes multiple low-level image-guided positioning systems corresponding to a low-level treatment center and a high-level image-guided positioning system corresponding to a high-level treatment center. The high-level image-guided positioning system is arranged among the multiple low-level image-guided positioning systems. The intersection of two beams generated by any two image-guided positioning systems among the low-level image-guided positioning systems and the high-level image-guided positioning system is the low-level treatment center. A beam generated by the high-level image-guided positioning system passes through the high-level treatment center. Multiple treatment nodes with the low-level treatment center as a spherical center and multiple treatment nodes with the high-level treatment center as a spherical center form a fully-spherical treatment space.